Elastic padding and filling composition.



'ments in Elastic Paddi'n UNITED STATES PATENT OFFICE.

ALBERT OETKER, OF OTTENSEN, NEAR ALTONA, GERMANY.

ELASTIC PADDING AND FILLING COMPOSITION.

No Drawing.

To all whom it may concern:

Be it known that I, ALBERT OETKER, manufacturer, a subject of the King of Prussia, residing at Ottensen, near Altona, in the Kingdom of Prussia, German Empire, have invented certain new and useful Improveand Filling Composition, of which the f0 lowing is a specification.

Articles made of vulcanized soft rubber are extensively used in various industries and trades, as wellas for domestic purposes. Such articles must be frequently replaced owing to their becoming worn on one side or owing to their being damaged. For this reason, therefore, a large quantity of soft rubber accumulates from which as is generally known, the caoutchouc can be recovered only with great difficulty. The following important economical and industrial problem has therefore arisen, namely the discovery of means for rationally and profitably utilizing old soft rubber. This also forms the object of the present invention, a further object of which is to manufacture an elastic padding and filling material, from such vulcanized soft rubber waste.

According 'to the present invention disintegrated soft rubber, ground so that it assumes the form of pieces or coarse powder, is combined by means of a binding agent into a mass which becomes soft when heated, and which becomes firm when allowed to cool. A mixture of gutta-percha with fat, parafiin and a small amount of resin is used as binding agent. A small quantity of caoutchouc may also be added to the mixture. The mixing proportions of the disintegrated soft rubber and binding agent may vary, according to the degree of disintegration of the soft rubber, and according to the particular purpose for which the filling or padding material is to be used. The most advantageous proportions for the ingredi- Specification of Letters Patent.

Application filed March 7, 1913. Serial No. 752,758.

' Patented Feb. 17, 1914..

ents forming the binding agent may be easily determined by preliminary experiments. The following are proportions which are suitable for many purposes: 50% of gutta percha, 10% of caoutchouc, 10% of resin, 30% of fat or parafiin.

The binding agent and the disintegrated rubber are mixed and worked up into a mass with the aid of heat in a suitable mixing machine. Disinfectants, such as benzoic acid or salicylic acid may, if desired, be added to the mass.

For the purpose of applying the padding or filling composition, it is heated, for instance, by placing it in hot water. The softened mass is then pressed into the'space which is to be filled, for instance into the space within a horse shoe, so that the space is completely and tightly filled.

The composition, when used as a 'horse shoe padding or filling is superior to any other existing padding or insertion owing to its great elasticity and the possibilit of obtaining a perfectly tight sealing in o the sole of the hoof.

The composition may also be used 'as floor covering or for the manufacture of floor coverings, such materials being both as regards elasticity and sound proofing properties greatly superior to existing floor coverings.

I claim:

A composition of matter for the filling of horse shoes, comprising disintegrated soft rubber held together by a binder composed of gutta-percha 50%, caoutchouc 10%, resin 10%, paraflin 30%, and benzoic acid.

In testimony whereof I ailix my signature in presence of two witnesses.

ALBERT OETKER.

Witnesses:

EnNEsT H. L. MUMMENHOFF, IDA CHRIST. HAFERMANN. 

